RF extension cables, also know as pigtails, are ideal to connect your radio module to an external antenna.
Connector: u.Fl Female - SMA Female
Cable Type: 1.13
Impedance: 50 Ohms ± 2
- 0.6 @ 100MHz for RG178
- 1.9 @ 1GHz for RG178
Note that u.Fl (also known as IPEX) female connectors, are not designed for multiple re-connections. They can normally withstand up to 30 mating cycles before start to present some kind of connection issues.
To minimize any signal loss, you should use the shortest cable possible and minimize the number of connections between the radio module and antenna.
For additional RF cable information, please refer to this excellent chart provided by Samtec: rf_cable_chart.pdf